Just as "Rock Band 2" launches, we're reminded of the "Guitar Hero" juggernaut.

Activision CEO Bobby Kotick said at the company's analyst day today that "Guitar Hero: Aerosmith" has generated more money for the band than any of their albums.

"[Their] version of 'Guitar Hero' generated far more in revenues than any Aerosmith album ever has," said Kotick. "Merchandising, concert sales, their ability to sign a new contract [have] all been unbelievably influenced by their participation in 'Guitar Hero.'"

An Aerosmith rep was not able to confirm Kotick's statement by press time.

Looks like Metallica should be pretty excited for their "Guitar Hero" title.